Beauty of Art

I found the reading that we read for todays class to be very confusing.  I did not really understand what the author was saying.  The only thing I took away from the piece is that art is beautiful and beauty is what sells.  However it did not seem like the author was saying that beauty is in the eye of the beholder when it comes to art.  I think that all art sells, all different kinds of art.  People like what they like and find what they think is beautiful, beautiful.  It seemed more like the artist was saying that the only art that sells is that which is pushed by art dealers, and those art dealers do not care about the art.  I could be completely off thought and maybe I'm just confused...